Understanding Your Nervous System: Why You Feel the Way You Do
You know that feeling when you’re lying in bed exhausted, but your brain just won’t turn off? Or when you snap at someone you love over something small, and you’re not even sure why you’re so on edge? Maybe you’ve noticed your stomach is a mess lately, or you can’t seem to shake this low-level anxiety that follows you around like a shadow.
Here’s the thing: it might not be “just stress.” It could be your nervous system trying to tell you something.
As an acupuncturist, I see this all the time. Someone comes in complaining about insomnia, digestive issues, or chronic tension in their shoulders, and when I dig a little deeper, I find that their nervous system has been running on fumes for months or even years. The good news? Once you understand what’s actually happening in your body, you can start to support yourself in ways that actually work.
So What Exactly Is Your Nervous System?
Think of your nervous system as your body’s internal alarm system. It’s constantly scanning your environment and asking, “Am I safe right now?” Based on the answer, it decides whether you should be calm and relaxed or ready to fight or run.
When everything’s going well, you have two settings that work together beautifully. There’s the “fight or flight” mode, your sympathetic nervous system, which kicks in when you need to respond to something urgent. Maybe you’re late for an appointment and racing to get there, or you’re having a tough conversation and your heart starts pounding. That’s normal and healthy in short bursts.
Then there’s the “rest and digest” mode, your parasympathetic nervous system, which is where the magic happens. This is when your body does all its healing work. Your heart rate slows down, your digestion works the way it should, and you actually feel grounded and calm. There’s a nerve called the vagus nerve that runs from your brain all the way down through your heart, lungs, and gut, and when it’s working properly, you feel normal. The problem happens when you get stuck in “fight or flight” – and trust me, more of us seem stuck there these days than not.
But What Does “Stuck” Actually Look Like?
Maybe you’re the person who can’t ever fully relax. Even on vacation, you’re mentally running through your to-do list or worrying about what’s waiting for you when you get back. Your body feels wired, your jaw is clenched, and if someone tells you to “just relax,” you want to throw something at them because you literally don’t know how to anymore.
Or maybe you’re on the other end: numb and disconnected. You go through the motions of your day, but nothing really feels good or bad. You’re just… existing. You’re exhausted all the time, but it’s not the kind of tired that sleep fixes. You can’t find joy or peace in the activities you used to love.
Some people swing between both extremes. One day you’re anxious and overwhelmed, the next you’re so shut down you can barely get out of bed. It feels like you’re on an emotional rollercoaster you didn’t buy a ticket for.
Physically, this often shows up in ways you might not connect to your nervous system at all. Your digestion goes haywire: bloating, constipation, or that annoying feeling where your stomach is in knots for no clear reason. You might get tension headaches, grind your teeth at night, or notice your hands and feet are always cold. Your immune system seems weaker than it used to be, and you’re getting sick more often.
And there’s something else possibly going on that doesn’t get talked about enough: unresolved grief can keep your nervous system locked in a stress response (it’s called “sympathetic lock-up”). I’m not just talking about losing someone you love, though that absolutely counts. I mean any kind of loss like a relationship that ended badly, a dream that didn’t work out, even disappointment you never fully processed. When we avoid feeling those big, uncomfortable emotions, our body holds onto them. It’s like carrying around a heavy backpack all day, every day. Your nervous system stays on high alert because it’s bracing for the next painful thing, which means you never fully land in a place of safety and rest.
What Throws Everything Off Balance?
Modern life is not set up to support a calm nervous system. We’re juggling demanding jobs, not getting enough sleep, drinking too much coffee to keep up, and scrolling through news and social media that keeps our brains in a constant state of low-level panic. Add in inflammation from the processed foods we eat when we’re too busy to cook, blood sugar crashes from skipping meals, and the fact that most of us barely move our bodies, it’s no wonder so many people feel like they’re barely holding it together.
And here’s one thing that really gets overlooked: boundaries. Or more specifically, the lack of them.
When you’re constantly saying “yes” when you really want to say “no”, when you’re bending over backwards to make everyone else comfortable while ignoring your own needs, when you’re letting people treat you in ways that don’t feel good because you don’t want to rock the boat, your body notices. It registers that as a threat. People-pleasing might keep things smooth on the surface, but internally, it’s exhausting. Your nervous system knows when you’re abandoning yourself, and it responds with anxiety, resentment, and eventually, complete burnout.
So How Do You Actually Fix This?
The good news is that your nervous system is incredibly adaptable. With the right support, you can retrain it to find calm more easily. Here are some things that actually work:
- Start with your breath. I know, I know… everyone says this. But there’s a reason. When you make your exhale longer than your inhale, you’re directly telling your nervous system that you’re safe. Try 4-7-8 breathing: breath in through your nose for a count of four, hold your breath for a count of seven, then exhale out your mouth for a count of eight. Do that two to three times and notice how your body starts to settle. This is especially helpful in the midst of conflict because you can do it without anyone being the wiser. It calms your nervous system and gives you the pause to think more clearly.
- Humming or singing works, too. It stimulates that vagus nerve I mentioned earlier, which is why humming when you’re anxious actually feels soothing.
- Cold water is also surprisingly effective. I’m not saying you need to take ice baths or do a cold plunge, but splashing cold water on your face or even holding an ice cube can snap you out of a stress spiral. It activates your vagus nerve and basically resets your system. It sounds too simple to work, but try it next time you’re spiraling and see what happens.
- Move your body, but gently. Sometimes when you’re already dysregulated, intense exercise can actually make things worse. A walk outside, some gentle stretching, or even just shaking your whole body (yes, like a dog after a bath) helps release tension and signals your nervous system that you’re safe. Movement doesn’t have to be complicated to be effective.
- Ground yourself in the present moment. When your brain is spinning out, try this: look around and name five things you can see, four things you can touch, three things you can hear, two things you can smell, and one thing you can taste. It interrupts the stress response and brings you back to where you actually are, which is usually safe – right in the here and now.
- And of course, there’s acupuncture! Acupuncture works directly with your body’s energy pathways to calm your nervous system, reduce inflammation, and help you drop into that rest-and-digest state. My patients tell me all the time that their treatments are among the only times of their days, weeks, lives where they actually feel relaxed (and I can tell you many have joked, “do you offer an overnight rate so I can just stay here and sleep?”). That’s not just in their heads; it’s their nervous system finally getting permission to let go.
What About Supplements?
Certain nutrients can give your nervous system the support it needs. Magnesium, found in foods like oatmeal, peanut butter and various seeds, is key in helping relax muscle tension, improving sleep, and calming an overactive nervous system. L-theanine, which is found in green tea, promotes a calm, focused state without making you drowsy. Omega-3s, found in oily fish like salmon and mackerel, reduce inflammation and support brain health. B vitamins are essential for your nervous system to function well, and adaptogens like ashwagandha help your body handle stress more gracefully. Vitamin D is also very helpful for your body’s resistance to stress.
That said, supplements work best when they’re part of a bigger strategy… good sleep, nourishing food, and practices that help you feel safe in your body.
Your Body Remembers
Here’s something most people don’t realize: your nervous system has a memory. If you grew up in a household where you had to constantly read the room, where you were walking on eggshells around someone’s unpredictable moods, or where you learned that your needs didn’t matter as much as keeping the peace, your nervous system might still be running that old program. Even though you’re an adult now and technically safe, your body is still braced for danger.
This is why you can’t always think your way out of anxiety. Your nervous system is responding to old patterns stored in your body, not just your current thoughts. Healing requires working with your body directly through breathwork, movement, therapy that focuses on the nervous system, and yes, acupuncture.
Connection Is Medicine
One of the most regulating things for your nervous system is being around calm, grounded people. When you spend time with someone who feels safe, your nervous system can literally borrow their calm. It’s called co-regulation (not to be confused with co-dependancy – that’s a whole other topic). That’s why a good conversation with a trusted friend can leave you feeling so much lighter, and why being around stressed, chaotic people can leave you feeling completely drained.
Laughter helps, too. It activates your parasympathetic nervous system and releases tension. It’s your body’s way of saying, “Hey, we’re safe enough to let our guard down for a minute.”
Where to Start
Your nervous system isn’t something you can force into submission with willpower. It’s responding to patterns, environments, and the signals your body is receiving. But with awareness and consistent care, you can help it find its way back to balance.
Maybe that’s through acupuncture, breathwork, better boundaries, moving your body, or simply giving yourself permission to rest without guilt. Every small step counts.
If you’ve been feeling anxious, overwhelmed, numb, or just not like yourself, your nervous system might be trying to get your attention. These aren’t character flaws or signs that you’re weak; they’re your body’s way of saying something needs to shift. So listen. Your nervous system has been working overtime to keep you safe. Now it’s time to help it feel safe too.